B57500 EPCOS AG, B57500 Datasheet - Page 4
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B57500
Manufacturer Part Number
B57500
Description
Ntc Thermistors For Temperature Measurement
Manufacturer
EPCOS AG
Datasheet
1.B57500.pdf
(10 pages)
Reliability data
Test
Storage in
dry heat
Storage in damp
heat, steady state
Storage in coldness
Rapid temperature
cycling (in fluid)
Vibration
resistance
Long-term stability
(empirical value)
Voltage proof test
Insulation test
Please read Cautions and warnings and
Important notes at the end of this document.
Temperature measurement
Probe assemblies
Standard
IEC
60068-2-2
IEC
60068-2-78
IEC
60068-2-14
IEC
60068-2-6
Test conditions
Storage at upper
category temperature
T: 100 C
t: 1000 h
Temperature of air: 40 C
Relative humidity of air: 93%
Duration: 56 days
Storage at lower
category temperature
T:
t: 1000 h
Lower test temperature: 0 C
Upper test temperature: 100 C
Time to change from lower to
upper temperature: <30 s
Number of cycles: 1000
Medium: oil
Frequency range: 5 to 500 Hz
Amplitude: 7.5 mm, 2 g
Duration: 3 x 8 h
Temperature: 100 C
t: 10000 h
1500 V AC,
1 s
The sensors are placed in a
vessel containing metallic balls of
1 mm diameter (with total
immersed head). The applied
voltage is 100 V DC.
30 C
Page 4 of 10
(typical)
< 2%
< 2%
< 2%
< 2%
< 3%
< 3%
R
25
/R
B57500K, B57501K
25
Remarks
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No flashover
Above
100 M
K500/K501